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More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","// This file is generated by `build.js`\n/**\n * @typedef {import('trigram-utils').TrigramTuple} TrigramTuple\n *\n * @typedef Options\n * @property {Array} [only]\n * Languages to allow.\n * @property {Array} [ignore]\n * Languages to ignore.\n * @property {number} [minLength=10]\n * Minimum length to accept.\n */\n\n/* Load `trigram-utils`. */\nimport {asTuples} from 'trigram-utils'\n\n/* Load `expressions` (regular expressions matching\n * scripts). */\nimport {expressions} from './expressions.js'\n\n/* Load `data` (trigram information per language,\n * per script). */\nimport {data} from './data.js'\n\n/* Maximum sample length. */\nconst MAX_LENGTH = 2048\n\n/* Minimum sample length. */\nconst MIN_LENGTH = 10\n\n/* The maximum distance to add when a given trigram does\n * not exist in a trigram dictionary. */\nconst MAX_DIFFERENCE = 300\n\nconst own = {}.hasOwnProperty\n\n/* Construct trigram dictionaries. */\n\n/** @type {string} */\nlet script\n\n/** @type {Record>>} */\nconst numericData = {}\n\nfor (script in data) {\n if (own.call(data, script)) {\n const languages = data[script]\n /** @type {string} */\n let name\n\n numericData[script] = {}\n\n for (name in languages) {\n if (own.call(languages, name)) {\n const model = languages[name].split('|')\n /** @type {Record} */\n const trigrams = {}\n let weight = model.length\n\n while (weight--) {\n trigrams[model[weight]] = weight\n }\n\n numericData[script][name] = trigrams\n }\n }\n }\n}\n\n/**\n * Get the most probable language for the given value.\n *\n * @param {string} [value]\n * The value to test.\n * @param {Options} [options]\n * Configuration.\n * @return {string}\n * The most probable language.\n */\nexport function franc(value, options) {\n return francAll(value, options)[0][0]\n}\n\n/**\n * Get a list of probable languages the given value is\n * written in.\n *\n * @param {string} [value]\n * The value to test.\n * @param {Options} [options]\n * Configuration.\n * @return {Array}\n * An array containing language—distance tuples.\n */\nexport function francAll(value, options = {}) {\n /** @type {Array} */\n // @ts-expect-error: `whitelist` is from long ago.\n const only = [...(options.whitelist || []), ...(options.only || [])]\n /** @type {Array} */\n // @ts-expect-error: `blacklist` is from long ago.\n const ignore = [...(options.blacklist || []), ...(options.ignore || [])]\n const minLength =\n options.minLength !== null && options.minLength !== undefined\n ? options.minLength\n : MIN_LENGTH\n\n if (!value || value.length < minLength) {\n return und()\n }\n\n value = value.slice(0, MAX_LENGTH)\n\n /* Get the script which characters occur the most\n * in `value`. */\n const script = getTopScript(value, expressions)\n\n /* One languages exists for the most-used script. */\n if (!script[0] || !(script[0] in numericData)) {\n /* If no matches occured, such as a digit only string,\n * or because the language is ignored, exit with `und`. */\n if (!script[0] || script[1] === 0 || !allow(script[0], only, ignore)) {\n return und()\n }\n\n return singleLanguageTuples(script[0])\n }\n\n /* Get all distances for a given script, and\n * normalize the distance values. */\n return normalize(\n value,\n getDistances(asTuples(value), numericData[script[0]], only, ignore)\n )\n}\n\n/**\n * Normalize the difference for each tuple in\n * `distances`.\n *\n * @param {string} value\n * Value to normalize.\n * @param {Array} distances\n * List of distances.\n * @return {Array}\n * Normalized distances.\n */\nfunction normalize(value, distances) {\n const min = distances[0][1]\n const max = value.length * MAX_DIFFERENCE - min\n let index = -1\n\n while (++index < distances.length) {\n distances[index][1] = 1 - (distances[index][1] - min) / max || 0\n }\n\n return distances\n}\n\n/**\n * From `scripts`, get the most occurring expression for\n * `value`.\n *\n * @param {string} value\n * Value to check.\n * @param {Record} scripts\n * Top-Scripts.\n * @return {[string|undefined, number]}\n * Top script and its occurrence percentage.\n */\nfunction getTopScript(value, scripts) {\n let topCount = -1\n /** @type {string|undefined} */\n let topScript\n /** @type {string} */\n let script\n\n for (script in scripts) {\n if (own.call(scripts, script)) {\n const count = getOccurrence(value, scripts[script])\n\n if (count > topCount) {\n topCount = count\n topScript = script\n }\n }\n }\n\n return [topScript, topCount]\n}\n\n/**\n * Get the occurrence ratio of `expression` for `value`.\n *\n * @param {string} value\n * Value to check.\n * @param {RegExp} expression\n * Code-point expression.\n * @return {number}\n * Float between 0 and 1.\n */\nfunction getOccurrence(value, expression) {\n const count = value.match(expression)\n\n return (count ? count.length : 0) / value.length || 0\n}\n\n/**\n * Get the distance between an array of trigram—count\n * tuples, and multiple trigram dictionaries.\n *\n * @param {Array} trigrams\n * An array containing trigram—count tuples.\n * @param {Record>} languages\n * Multiple trigrams to test against.\n * @param {Array} only\n * Allowed languages; if non-empty, only included languages are kept.\n * @param {Array} ignore\n * Disallowed languages; included languages are ignored.\n * @return {Array} An array\n * containing language—distance tuples.\n */\nfunction getDistances(trigrams, languages, only, ignore) {\n languages = filterLanguages(languages, only, ignore)\n\n /** @type {Array} */\n const distances = []\n /** @type {string} */\n let language\n\n if (languages) {\n for (language in languages) {\n if (own.call(languages, language)) {\n distances.push([language, getDistance(trigrams, languages[language])])\n }\n }\n }\n\n return distances.length === 0 ? und() : distances.sort(sort)\n}\n\n/**\n * Get the distance between an array of trigram—count\n * tuples, and a language dictionary.\n *\n * @param {Array} trigrams\n * An array containing trigram—count tuples.\n * @param {Record} model\n * Object containing weighted trigrams.\n * @return {number}\n * The distance between the two.\n */\nfunction getDistance(trigrams, model) {\n let distance = 0\n let index = -1\n\n while (++index < trigrams.length) {\n const trigram = trigrams[index]\n let difference = MAX_DIFFERENCE\n\n if (trigram[0] in model) {\n difference = trigram[1] - model[trigram[0]] - 1\n\n if (difference < 0) {\n difference = -difference\n }\n }\n\n distance += difference\n }\n\n return distance\n}\n\n/**\n * Filter `languages` by removing languages in\n * `ignore`, or including languages in `only`.\n *\n * @param {Record>} languages\n * Languages to filter\n * @param {Array} only\n * Allowed languages; if non-empty, only included languages are kept.\n * @param {Array} ignore\n * Disallowed languages; included languages are ignored.\n * @return {Record>}\n * Filtered array of languages.\n */\nfunction filterLanguages(languages, only, ignore) {\n if (only.length === 0 && ignore.length === 0) {\n return languages\n }\n\n /** @type {Record>} */\n const filteredLanguages = {}\n /** @type {string} */\n let language\n\n for (language in languages) {\n if (allow(language, only, ignore)) {\n filteredLanguages[language] = languages[language]\n }\n }\n\n return filteredLanguages\n}\n\n/**\n * Check if `language` can match according to settings.\n *\n * @param {string} language\n * Languages to filter\n * @param {Array} only\n * Allowed languages; if non-empty, only included languages are kept.\n * @param {Array} ignore\n * Disallowed languages; included languages are ignored.\n * @return {boolean}\n * Whether `language` can match\n */\nfunction allow(language, only, ignore) {\n if (only.length === 0 && ignore.length === 0) {\n return true\n }\n\n return (\n (only.length === 0 || only.includes(language)) && !ignore.includes(language)\n )\n}\n\n/**\n * Create a single `und` tuple.\n */\nfunction und() {\n return singleLanguageTuples('und')\n}\n\n/**\n * Create a single tuple as a list of tuples from a given language code.\n *\n * @param {string} language\n * @returns {Array}\n */\nfunction singleLanguageTuples(language) {\n return [[language, 1]]\n}\n\n/**\n * Deep regular sort on the number at `1` in both objects.\n *\n * @param {TrigramTuple} a\n * @param {TrigramTuple} b\n */\nfunction sort(a, b) {\n return a[1] - b[1]\n}\n"]}